Evaluation of mass screening for cancer : a model-based approach

The main goal in evaluation of screening for cancer is to assist in decision making about a screening program: Should it be initiated at all? What screening policies can be recommended: what age groups, what frequency of screening. Should special attention be paid to high risk groups? If a screening program is already running, should screening be continued in view of the results? Should the present policy be changed? In this chapter, I will describe the complexities involved in answering these questions. These difficulties lead to the conclusion that models are indispensable in the interpretation of observed results of screening and in the prediction of effects and costs of different screening policies.

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